Structural Engineering and Mechanics

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Resilient structures in the seismic retrofitting of RC frames: A case study

  • Pallares, Francisco J. (ICITECH, Universitat Politecnica de Valencia) ;
  • Dominguez, David (University of Talca, Faculty of Engineering, Department of Construction Engineering and Management) ;
  • Pallares, Luis (ICITECH, Universitat Politecnica de Valencia)
  • Received : 2019.10.07
  • Accepted : 2020.05.18
  • Published : 2020.10.10
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Abstract

It is very important to allocate valuable resources efficiently when reconstructing buildings after earthquake damage. This paper proposes the use of a simple seismic retrofitting system to make buildings more resilient than the stiffer systems such as the shear walls implemented in Chile after the earthquake in 2010. The proposal is based on the use of steel chevron-type braces in RC buildings as a dual system to improve the seismic performance of multistory buildings. A case study was carried out to compare the proposal with the shear wall solution for the typical seismic Chilean RC building from the structural and economic perspectives. The results show that it is more resilient than other stiffer seismic solutions, such as shear walls, reduces the demand, minimizes seismic damage, gives reliable earthquake protection and facilitates future upgrades and repairs while achieving the level of immediate occupancy without the costs of the shear walls system.

Keywords

Acknowledgement

The authors wish to thank the Universitat Politècnica de València (UPV) (PAID-00-17), the Generalitat Valenciana (GVA) and the Spanish Ministry of Economy and Competitiveness (MINECO) for the grants and funds received to support this investigation: BIA2012-35186, BIA2015-70651-R, BEST/2018.

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